What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)?…

Chemistry WAEC 1995

What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64]

  • 88.9% checkmark
  • 80.0%
  • 66.7%
  • 20.0%
  • 11.1%

The correct answer is: A

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